How to solve z fighting and transparency? (Cycles)

The same as this question probably.

Here is the setting:

I was expecting the transparency won't be mixed here, but to see only the blue cube, because a transparent object should stay transparent (?).

Is it possible to avoid that without changing the cubes' positions?

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asked Mar 6 '17 at 13:44

lemon

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$\begingroup$ No I don't think it is, the solution is really not to have overlapping geometry, no render engine likes that really, and most deal with it pretty badly as far as I know, unless both objects have exactly the same material. Why would you want overlapping geometry in the first place, if I may ask? $\endgroup$ – Duarte Farrajota Ramos♦ Mar 6 '17 at 19:15
$\begingroup$ Thanks for this comment, @DuarteFarrajotaRamos, I don't want overlapping geometry, but I'd like 'overlapping geometry safe' solution for this issue. $\endgroup$ – lemon Mar 6 '17 at 19:22
$\begingroup$ Only workaround I really know is that if both objects use a similar shader or material color the Z Fighting becomes less visible or unnoticeable $\endgroup$ – Duarte Farrajota Ramos♦ Mar 6 '17 at 19:26
$\begingroup$ @DuarteFarrajotaRamos, could you elaborate more this last comment? FYI, each cube here has its own material... so how can be understood 'similar shader'? $\endgroup$ – lemon Mar 6 '17 at 19:31
$\begingroup$ Nothing too elaborate, just mentioning that if both cubes were blue colored then you can't really see the Z fighting between them. $\endgroup$ – Duarte Farrajota Ramos♦ Mar 6 '17 at 19:42

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